Tomcat 5 supports JMX and can run as an embedded server

A rather interesting interview with Tomcat 5 developer 
 Jean-Francois Arcand appeared on The Server Side. Among other things, it covers support for management through JMX and the option of running Tomcat as an embedded server. If you use Tomcat, are testing it or are considering it, I recommend at least skimming the interview. It has information that would be harder to dig up in mailing lists or buried documentation.